Influence de la lumière et de la température sur la croissance de quatre espèces d'algues d'un lac eutrophe (Lac d'Aydat, Puy de Dôme, France)

The interdependence between light and temperature was studied in batches and in non nutrient-limited conditions for single strain, non axenic cultures of four species : Fragilaria croionensis, Anabaena macrospora, Staurasirum pingue and Coelaslrum cambricum. The maximum growth rates were found to be 0.57. 0.63, 0.77 and 1.4 day', respectively at temperatures of 25, 25, 27 and 35° C and light intensities of 150, 170, 270 and 290 ^E.m 2.s-i. Results were obtained over a temperature range of 10 to 35° C and light intensities between 5 and 800 ^E.m-2.s' under a 15/9 photoperiod and were adjusted by a model.